Lathe-driver.



D. H. TEAS & G. T. REISS.

LATHE DRIVER. APPLIGATION FILED AUG. 25. 1911.

Patented Jan.9, 1912.

0 40 o flmaww W M M .if a

mam

Z Wale To all whom it may concern:

r TED STATES PAilEN OFF DANIEL H. TEAS, OF NEW HAVEN, CONNECTICUT, AND GEORGE T. REISS,-OF HAMIL- TON, OHIO, ASSIGNORS TO NILES-BEMENT-POND COMPANY, OF JERSEY CITY, NEW

JERSEY.

LATHE-DRIVER.

Specification of Letters Patent.

Be it known that we, DANIEL H. TEAS, a

citizen of the United States, residing at New Haven, New Haven county, Connecticut, post-ofiice address care of Niles-Bernent- Pond Co., 111 Liberty street, New York, N. Y., and GEORGE T. Rnrss, a citizen of the United States, residing at Hamilton, Butler county, Ohio, post-ofiice address care; of Niles Tool'Works, Hamilton, Ohio, have invented certain new and useful Improvements in Lathe-Drivers, of which the following is a specification.

This present invention pertains to lathe drivers employed in the turning of steel tired railway wheels, and relates to 1mprovements in the class of lathe drivers known as Teas drivers, this class being exemplified in Teass United StatesPatents No. 770546, No. 815659, and No. 853273. In the drivers of this class the serrated blocks drive by the bite of their teeth, engaging the outer face of the tire, the drivers being secured to the face plates of the lathe and being forced up to the biting work by means of screws. While, in such drivers, provision has been made for the automatic increase of the biting power, it has been found a that in some cases there was no, proper limit to the biting power, the result being the im osition of unnecessarystrains upon the lat e and upon the wheel-and-axle struc-' ture, and, in other cases, where eccentrica-lly pivoted toothed blocks were employed, the automatic action would in some cases carry the pivoted blocks past the maximum point of biting and cause them to release their h'old upon the work.

This invention will be readily understood from the following description, taken in connection with the accompanying drawing, in which Figure 1 is the face elevation of a lathe driver exemplifying our invention; Fig. 2

a side elevation of the same, showing the driver secured to the face-plate partially appearing in radial section in the plane of line b of the other two figures; and Fig. 3 is a horizontal section in the plane of line a of the other two figures.

In the drawing :-1, .indicates one of the usual face-plates of a tire-lathe: 2, one of the usual radial T-shaped slots in the faceplate: 3, a bracket secured to the face sur-- face of the face-plate: 4, a rib on the back of the bracket, this rib engaging the T-slot of the face-plate: 5, a bolt. engaging the bracket and the T-slot of the face-plate and Patented Jan. 9,1912.

serving as means by which the bracket can i be firmly secured to the face-plate in desired radial position thereon: 6, a slot in the outer end of the bracket, this slot extending parallelwith the axis of the faceplate and extending substantially at right angles to the radius of the face-plate: 7, a carrying-block fitted to slidein the slot of the bracket, in a direction to and from the face-plate: 8, a set screw mounted in the rear portion of the bracket and adapted to 'flQOr; being at an angle to the face of the face fplate, the directionof the angle being such that, as the driver advances in the direction of the arrows upon Figs. 1 and 3, the gap will be shallowest at its trailing end,

'the rear surface of the toothed block being made to correspond-with the-inclined floor of the gap: 13, a spring carried by the carrying-block and engaging the toothed-block and tending to urge the toothed block to the deeper end of the gap in the carryingblock :and 14, a pin carried by the carryingblock and freely engaged by the toothed block, the spring surrounding this pin.

- The new drivers are employed in the manner usual with lathe drivers of the Teas class, that is to say, each face-plate of the lathe will be provlded with a plurality of drivers, preferably four, so adjusted radlally in the face-plates that the toothed blocks will engage outer faces of the tires, after which, by means of the screws, the toothed blocks are forced into indenting engagement with the tire, the lathe being then started at its work. The strain of the driving, when the driver is moving in the direction of the arrows of Figs. 1 and 3, cause the toothed blocks to retreat on the inclined floors of the gaps of the carrying-blocks, thus increasing the penetration of the teeth topthed blocks the blocks will reach the trailing ends of-the gaps in the carrying-blocks and be stopped by the trailing end-walls of the gaps. Pin 14 is to be so loosely or eccentrically engaged by the toothed block as not to interfere with the movement of the block endwise in the gap, and the purpose of the spring is to return the toothed block to the deep end of the gap when the driving strain has been taken off. When the carrying-block is removed from the bracket then the pin and spring and toothed block may be readily separated.

We claim 1. A lathe driver comprising, a bracket adapted to be secured to a face-plate and provided with a socket, a carrying-block mounted to slide in said socket to and from the face plate and provided witha gap having a floor inclined to the face-plate, means for forcing the carrying-block in the direction away from the face-plate, and a toothed block adapted to slide in said gap-and having its rear portion engaging sa1d inclined floor, combined substantially as set forth.

2. A lathe .driver comprising, a bracket adapted to be secured to a faceplate and provided with a socket, a carrying-block mounted to slide in said socket to and from the face-plate and provided with a gap having a floor inclined to the face-plate,

means for forcing the carrying-block in the 7 direction away from the face-plate, a toothed block adapted to slide in said gap and having its rear portion engaging sa1d inclined floor, and a stop to limit the sliding of the toothed block upon the inclined floor, combined substantially as set forth.

3. A lathe driver comprising :-a bracket adapted. to be secured to a face-plate and provided with a socket, a carrying-block mounted to slide in said socket to and from the face-plateand provided with a gap having a floor infblined to the face-plate, means for forcing the carrying-block in the direction away from the face-plate, a toothed block adapted to slide in said gap and having'its rear portion engaging sa1d inclined floor, and a spring coiiperating with the carrying-block and toothed block and acting to press the toothed block to the deeper end A of said gap, forth.

4:. A lathe driver comprising :-a bracket adapted to be secured to a face-plate and provided with a socket, a carrying-blo'k mounted to slide in said socket to and from the face-plate and rovided with a gap having a floor inclined to the face-plate, means for forcing the carrying-block in the direction away from the face-plate, a toothed block adapted to slide in said gap and having its rear portion engaging sa1d inclined floor, a pin supported by the end walls of said gap and passing freely through said toothed block, and a spring surrounding said-pin'and cooperating with the toothed block and one of the-end walls of said gap, combined substantially as set fort DANIEL H. TEAS. GEORGE T. REISS. Witnesses as to Teas: CHAs. M. Pom),

W. S. SEARLES. Witnesses as to Reiss:

JAMES W. SEE, M. S. BELDEN.

combined substantially as set 

